<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        div{
            color: red;
            font-size: 10px;
        }
        #d1{
            color: blue;
        }
        p{
            color: green;
        }
    </style>
</head>
<body>
<div id="d1">
    <p>这是p标签</p>
    <span>这是span标签</span>
    <a href="">这是超链接</a>
    <h1>这是h1</h1>
</div>
</body>
</html>